A modern duplex typically refers to a residential building consisting of two separate living units, with each unit occupying a floor or multiple floors. Here's a description of a modern duplex 3D model:

Exterior:The exterior of the duplex features sleek and contemporary architecture. It may have a combination of materials, such as glass, concrete, and steel, giving it a modern and minimalist appearance. Large windows are incorporated to allow ample natural light and provide views of the surroundings. The building may have clean lines and geometric shapes, showcasing a modern aesthetic.

-3ds max 2018-vray 3.06.3